Not an IF formula, but try =SUM(OFFSET(A2,0,0,1,MATCH(K2,A1:E1,1)))
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David Biddulph

"Lisa" wrote in message
...
I need help with the formula.

A B C D E
1 Jan Feb Mar Apr May
2 10 5 15 7 8

If K2 is Mar I need to sum A2 thru C2. If K2 is May I need to sum A2 thru
E2.

Thank you in advance.